Hemming B.,Center for Metrology and Accreditation | Widmaier T.,Aalto University | Palosuo I.,Center for Metrology and Accreditation | Esala V.-P.,Center for Metrology and Accreditation | And 5 more authors.Proceedings of the International Conference of DAAAM Baltic "Industrial Engineering" | Year: 2014

The roundness of rolls is critical for the operation of the paper machines and for the rolling mills in the steel industry. Therefore the rolls are periodically reground and roundness measurements are made throughout the grinding process. During the last decades several manufacturers have developed measurement systems for large rolls of diameter 500 to 2000 mm. The multi-point measurement algorithms of the systems are typically based on measurement algorithm by Ozono. The advantage of this method is that it can separate the movement and the geometry of the measured rotor, i.e., roll. From a metrological and quality perspective every serious measurement should be traceable and every measurement result reported together with an estimation of measurement uncertainty. Therefore, calibration discs are developed and traceable calibrated in laboratories of MIKES and Metrosert with a known measurement uncertainty. By measuring these standards by multi-point roundness instruments in industry new procedures to get traceability for roundness measurements of rolls, will be developed.
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The purpose of the survey was to find the impact of metrology on Estonian economy. 450 different enterprises were polled and several interviews were carried out. One of the outcomes was that annual expenditure of 28-40 mln € on metrology produces 2,8 bln € through avoiding unnecessary costs.
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